#app {
    width: 100vw;
    height: 100vh;
  }

  .flex-row {
    display: flex;
    flex-direction: row;
  }

  .flex-col {
    display: flex;
    flex-direction: column;
  }
  .justify-start {
    justify-content: flex-start;
  }
  
  .justify-end {
    justify-content: flex-end;
  }
  
  .justify-center {
    justify-content: center;
  }
  
  .justify-between {
    justify-content: space-between;
  }
  
  .justify-around {
    justify-content: space-around;
  }
  
  .justify-evenly {
    justify-content: space-evenly;
  }
  
  .items-start {
    align-items: flex-start;
  }
  
  .items-end {
    align-items: flex-end;
  }
  
  .items-center {
    align-items: center;
  }
  
  .items-baseline {
    align-items: baseline;
  }
  
  .items-stretch {
    align-items: stretch;
  }
  
  .self-start {
    align-self: flex-start;
  }
  
  .self-end {
    align-self: flex-end;
  }
  
  .self-center {
    align-self: center;
  }